M54671SP Mitsubishi Electronics America, Inc., M54671SP Datasheet

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M54671SP

Manufacturer Part Number
M54671SP
Description
2-phase Stepper Motor Driver
Manufacturer
Mitsubishi Electronics America, Inc.
Datasheet
DESCRIPTION
The M54671SP is a semiconductor IC to drive a bipolar stepper
motor directly by controlling the coil current with the constant
current method.
FEATURES
APPLICATION
Office automation equipment such as printer, FDD, HDD, and FAX
FUNCTION
The M54671SP can drive a stepper motor by the 2-phase bipolar
method and also control the coil current. Furthermore, it controls
the direction of the coil current with Ph input pins (pins 16 and 17)
and the coil current value with V
Because two control circuits are built in this IC, a stepping motor
can be driven with a single IC by the 2-phase bipolar method.
BLOCK DIAGRAM
Wide output current control range (20 – 1200mA)
Bipolar and constant current
Built in a thermal shutdown circuit
19
32
25
GND
30
24
Voltage sensor
23
Comparator input(2)
17
C2
31
Standby circuit
comparator
29
R
pins (pins 3 and 30).
Monostable
28
One-shot-multi time constant(2)
18
T2
27
22
Current sensor(2)
21
26
E2
20
1
Output current direction
8
PIN CONFIGURATION (TOP VIEW)
GND
Comparator input(1)
One-shot-multi time
3
9
Current sensor(1)
reference input(1)
Voltage sensor
Standby input(1)
Bootstrap power
Bootstrap power
Power supply(1)
10
Comparator input(1)
Output power
Output power
switching(1)
Comparator
16
constant(1)
Output(1)
Output(1)
supply(1)
supply(1)
supply(1)
supply(1)
2-PHASE STEPPER MOTOR DRIVER
MITSUBISHI <CONTROL / DRIVER IC>
C1
2
GND
Standby circuit
comparator
V
V
Vcc1
V
V
4
MM
M
M
MM
V
Ph1
bs
bs
S
C1
A
E1
R
B
T1
t
1
1
1
1
1
1
1
1
10
11
12
13
14
15
16
Monostable
1
2
3
4
5
6
7
8
9
Outline 32P4B
5
One-shot-multi time constant(1)
15
T1
6
11
Current sensor(1)
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
M54671SP
S
C2
V
V
V
M
E2
M
V
V
Vcc2
T2
Ph2
12
E1
t
R
bs
MM
MM
bs
A
B
7
2
2
2
2
2
2
GND
2
2
Standby input(2)
Comparator input(2)
Comparator reference
input(2)
Bootstrap power
supply(2)
Output power
supply(2)
Output(2)
Current sensor(2)
Output(2)
Output power
supply(2)
Bootstrap power
supply(2)
Power supply(2)
One-shot-multi time
constant(2)
Output current direction
switching(2)
13
14

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M54671SP Summary of contents

Page 1

... DESCRIPTION The M54671SP is a semiconductor IC to drive a bipolar stepper motor directly by controlling the coil current with the constant current method. FEATURES Wide output current control range (20 – 1200mA) Bipolar and constant current Built in a thermal shutdown circuit APPLICATION Office automation equipment such as printer, FDD, HDD, and FAX ...

Page 2

... Voltage at sensing resistor is not included. V =12.7V, V =12V, I =800mA =12V dVK/dt 50mV =5V, 1phase CC “H” V =2.4V I “L” V =0.4V I M54671SP Ratings Unit -0.3 – -0.3 – -0.3 – -0.3 – -0.3 – -0.3 – -10 mA -10 mA 1500 mA 1.70 W -20 – 75 ˚C -55 – ...

Page 3

... The pulse width of the monostable at the external timing C T OFF Retrigger during T (5) Analog control The output current level can be continuously changed by changing the voltage at V comparator. TYPICAL CHARACTERISTICS MITSUBISHI <CONTROL / DRIVER IC> M54671SP 2-PHASE STEPPER MOTOR DRIVER continuously ...

Page 4

... Stepper motor (3.7mH / 6 / phase) MITSUBISHI <CONTROL / DRIVER IC> M54671SP 2-PHASE STEPPER MOTOR DRIVER Phase ...

Page 5

... Flywheel Flywheel diode is not built in this IC. Before use, connect a flywheel diode between each output (M and output power supply (V ). (Refer to APPLICATION MM EXAMPLE and MITSUBISHI <CONTROL / DRIVER IC> M54671SP 2-PHASE STEPPER MOTOR DRIVER ...

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